Pattern is rated easy. It requires basic knowledge of Tunisian crochet: Tunisian simple stitch and a simple variation called Tunisian extended simple stitch (link to video tutorial included), increasing and decreasing (explainations included).
If you’re a beginner, I’m sure you’ll find it easy and enjoy it. And if you’re a more experienced crocheter wanting to indulge in a relaxing project, this one is quick enough to give you immediate satisfaction.